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Calorimetric analysis of dysprosia and dysprosia-doped zirconia ceramics

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Abstract

Dysprosia (Dy2O3) and dysprosia-doped ZrO2 (~10 wt% Dy2O3) samples were subjected to calorimetric and thermal analyses to understand the effect of dysprosia doping on the thermal properties of ZrO2 and to compare the thermal conductivity of dysprosia-doped ZrO2 (DySZ) to standard 7YSZ (7 wt% Y2O3 in ZrO2). All doped samples were plasma sprayed and subsequently sintered to ensure material densification (reduced porosity for bulk property analysis) and sufficient diffusion of constituents throughout the samples. Differential scanning calorimetry was used to measure the specific heat capacity values for powder and sintered samples as a function of temperature. The thermal conductivities of sintered samples were measured using laser flash techniques. The results showed that the addition of dysprosia to ZrO2 has lowered both the specific heat capacity and thermal diffusivity when compared to the standard 7YSZ. The resulting thermal conductivity of DySZ was 75% lower than that of 7YSZ under the sintered condition.

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Acknowledgements

We would like to acknowledge the continued support from the National Research Council (NRC) Canada, in particular contributions from M. Lamontagne at the Industrial Materials Institute (IMI). Funding for this research was provided by the Natural Sciences and Engineering Research Council (NSERC).

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Authors and Affiliations

  1. Department of Mechanical and Aerospace Engineering (MAAE), Carleton University, Ottawa, ON, Canada

    Javier Romualdez & Xiao Huang

  2. Institute for Aerospace Research (IAR), National Research Council (NRC), Ottawa, ON, Canada

    Rick Kearsey & Qi Yang

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  1. Javier Romualdez
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  2. Xiao Huang
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  3. Rick Kearsey
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  4. Qi Yang
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Correspondence to Javier Romualdez.

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Romualdez, J., Huang, X., Kearsey, R. et al. Calorimetric analysis of dysprosia and dysprosia-doped zirconia ceramics. J Therm Anal Calorim 110, 1061–1067 (2012). https://doi.org/10.1007/s10973-011-2033-4

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  • DOI: https://doi.org/10.1007/s10973-011-2033-4

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